From c33e0fca3508f0aa387b1c10d0ef158102deb140 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 6 Dec 2006 20:31:50 -0800 Subject: [PATCH] [PATCH] oom: don't kill unkillable children or siblings Abort the kill if any of our threads have OOM_DISABLE set. Having this test here also prevents any OOM_DISABLE child of the "selected" process from being killed. Signed-off-by: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/oom_kill.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 2e3ce3a928b9..bc2627deb7f9 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -313,15 +313,24 @@ static int oom_kill_task(struct task_struct *p, const char *message) if (mm == NULL) return 1; + /* + * Don't kill the process if any threads are set to OOM_DISABLE + */ + do_each_thread(g, q) { + if (q->mm == mm && p->oomkilladj == OOM_DISABLE) + return 1; + } while_each_thread(g, q); + __oom_kill_task(p, message); + /* * kill all processes that share the ->mm (i.e. all threads), * but are in a different thread group */ - do_each_thread(g, q) + do_each_thread(g, q) { if (q->mm == mm && q->tgid != p->tgid) __oom_kill_task(q, message); - while_each_thread(g, q); + } while_each_thread(g, q); return 0; }